— It's not officially confirmed yet. The committee are _________ it over.
A:effort; blowing
B:bid; talking
C:bid; blowing
D:effort; talking
If you do things ________, usually you can't do them well.
处在如图所示的四种电场中P点的带电粒子,由静止释放后只受电场力作用,其加速度一定增大的是:( )